CDC 2A652 Vol. 4

85 Questions | By Dinstaar2a652 | Updated: Mar 21, 2022 | Attempts: 2490

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Aerospace Ground Equipment Journeyman Common AGE Systems. Edit Code 05.

Questions and Answers

1.

What component on the New Generation Heater activates the HCU?
- A.
  
  Oil pressure switch.
- B.
  
  Burner control unit.
- C.
  
  Heat control switch.
- D.
  
  Thermostatic sensor.
2.

The HCU on the New Generation heater starts the main air fan for output air when
- A.
  
  A heat setting is selected.
- B.
  
  Constant flame is established.
- C.
  
  The temperature gauge reads cool.
- D.
  
  The inside temperature reaches 140 degrees F.
3.

When should you use starting aids to start the New Generation Heater?
- A.
  
  During the engine start up with the ignition switch in PREHEAT position.
- B.
  
  Never, as it will result in serious engine damage.
- C.
  
  When the temperature gauge reads COOL.
- D.
  
  When ambient temperature is below 32 degrees F.
4.

Repair of ground heater equipment should never be attempted
- A.
  
  Without first talking with the operator.
- B.
  
  Without first consulting your supervisor.
- C.
  
  Unless accurate technical data is available.
- D.
  
  Unless in the presence of an experienced mechanic.
5.

The amount of heat required to raise the temperature of one pound of a substance on degree Fahrenheit is known as
- A.
  
  British thermal unit.
- B.
  
  Sensible unit.
- C.
  
  Specific heat.
- D.
  
  Latent heat.
6.

Heat that can be felt and added or subtracted to a substance without changing its state is called
- A.
  
  Super heat.
- B.
  
  Latent heat.
- C.
  
  Specific heat.
- D.
  
  Sensible heat.
7.

Heat added to a gaseous substance is known as
- A.
  
  Sensible heat.
- B.
  
  Specific heat.
- C.
  
  Super heat.
- D.
  
  Latent heat.
8.

The relationship between pressure and the boiling point of a liquid is seen when
- A.
  
  Pressure increases, it raises the boiling point.
- B.
  
  Pressure increases, it lowers the boiling point.
- C.
  
  The boiling point increases, it raises the pressure.
- D.
  
  The boiling point increases, it lowers the pressure.
9.

The factors that have the greatest bearing on the temperature of a refrigerant are the boiling of a liquid and the amount of heat applied and the
- A.
  
  Temperature of the vapor.
- B.
  
  Type of heat transfer.
- C.
  
  Moisture in the air.
- D.
  
  Pressure applied.
10.

What component on the MA-3D air conditioner allows the operator to control the overall volume of air leaving the unit?
- A.
  
  Blower control switch.
- B.
  
  Airflow control switch.
- C.
  
  Evaporator control switch.
- D.
  
  Temperature control switch.
11.

What type of solution is used in the MA-3D aftercooler system to carry heat away from the conditioned air stream?
- A.
  
  Liquid refrigerant.
- B.
  
  Gaseous refrigerant.
- C.
  
  Pure water solution.
- D.
  
  Ethylene glycol/water solution.
12.

Refrigerant that leaves the evaporator coil in the MA-3D air conditioner is further changed into a
- A.
  
  Low pressure gas.
- B.
  
  High pressure gas.
- C.
  
  Low pressure liquid.
- D.
  
  High pressure liquid.
13.

After the refrigerant leaves the compressor on the MA-3D air conditioner, it passes through the oil separator and into the
- A.
  
  Heatsink coils.
- B.
  
  Condenser coils.
- C.
  
  Evaporator coils.
- D.
  
  Receiver inlet valve.
14.

When starting the MA-3D air conditioner, hold the safety override switch until
- A.
  
  30 psi oil pressure is registered on the engine oil pressure gauge.
- B.
  
  You release the start switch.
- C.
  
  The engine warms up.
- D.
  
  The engine starts.
15.

What component on the MA-3D air conditioner receives input from sensors for suction pressure and leaving air temperature?
- A.
  
  Air cooler fan.
- B.
  
  Air volume controller.
- C.
  
  Temperature controller.
- D.
  
  Temperature control knob.
16.

What component on the MA-3D air conditioner shuts off the compressor when the suction pressure drops below 5 psi?
- A.
  
  Low pressure cutout.
- B.
  
  High pressure cutout.
- C.
  
  Temperature controller.
- D.
  
  Temperature control switch.
17.

What type of refrigeration system leak occurs when the pressure within the system is less than atmospheric pressure?
- A.
  
  Inward leaks.
- B.
  
  Vacuum leaks.
- C.
  
  Pressure leaks.
- D.
  
  Outward leaks.
18.

When performing refrigerant recovery, be sure
- A.
  
  To use vacuum pumps.
- B.
  
  To use the HCU.
- C.
  
  The output air is between 150°F – 185°F.
- D.
  
  The refrigerant has become a low-pressure vapor for compressor use.
19.

The air cycle machine of an A/M32C–10D air conditioner consists of
- A.
  
  A air compressor fan only.
- B.
  
  An expansion turbine only.
- C.
  
  A heat exchanger and an expansion turbine.
- D.
  
  An expansion turbine and a compressor fan.
20.

The component of a A/M32C–10D air conditioner that extracts energy from the bleed air on the air cycle machine is the
- A.
  
  Compressor.
- B.
  
  Heat exchanger.
- C.
  
  Expansion turbine.
- D.
  
  Temperature controller.
21.

The compressor switch on the ACE 802S must be held in the HOLD position when engaging the compressor in order to
- A.
  
  Ensure the engine is at governed speed before engaging compressor.
- B.
  
  Allow the oil and discharge pressures to stabilize.
- C.
  
  Defrost the evaporator.
- D.
  
  Build-up oil pressure.
22.

What action occurs in the evaporator of the ACE 802S air conditioner?
- A.
  
  Condensing refrigerant absorbs heat from the air stream.
- B.
  
  Boiling refrigerant absorbs heat from the air stream.
- C.
  
  Condensing refrigerant looses heat to the air stream.
- D.
  
  Boiling refrigerant looses heat to the air stream.
23.

What system on the ACE 802S air conditioner “supercharges” the compressor?
- A.
  
  Defrost.
- B.
  
  Heat boost.
- C.
  
  Vapor injection.
- D.
  
  Liquid injection.
24.

What valve must be opened prior to starting the engine on the ACE 802S?
- A.
  
  Air shutoff.
- B.
  
  Fuel shutoff.
- C.
  
  Coolant control.
- D.
  
  Refrigerant flow.
25.

What must be accomplished to avoid damage prior to operating the ACE 802S air conditioner in the HEATING mode after COOLING mode operation?
- A.
  
  Permit refrigerant pressure to equalize.
- B.
  
  Perform maximum refrigerant pump down.
- C.
  
  Place heating/cooling switch in HEATING position.
- D.
  
  Place the reversing valve lever in the HEATING position.